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A person in a state of TGA exhibits no other signs of impaired cognitive functioning but recalls only the last few moments of consciousness, as well as possibly a few deeply encoded facts of the individual's past, such as their childhood, family, or home perhaps. [1] [2] Both TGA and anterograde amnesia deal with disruptions of short-term ...
A person experiencing a TEA episode has very little short-term memory, so that there is profound difficulty remembering events in the past few minutes (anterograde amnesia), or of events in the hours before the onset of the attack, and even memories of important events in recent years may not be accessible during the amnestic event (retrograde amnesia). [6]
Anterograde amnesia can also be caused by alcohol intoxication, a phenomenon commonly known as a blackout. Studies show rapid rises in blood alcohol concentration over a short period of time severely impair or in some cases completely block the brain's ability to transfer short-term memories created during the period of intoxication to long ...
Transient global amnesia is a well-described medical and clinical phenomenon. This form of amnesia is distinct in that abnormalities in the hippocampus can sometimes be visualized using a special form of magnetic resonance imaging of the brain known as diffusion-weighted imaging (DWI). Symptoms typically last for less than a day and there is ...
Because psychogenic amnesia is defined by its lack of physical damage to the brain, [16] treatment by physical methods is difficult. [7] Nonetheless, distinguishing between organic and dissociative memory loss has been described as an essential first-step in effective treatments. [1]
Although a TGA is scary for both patients and their families, transient global amnesia is a benign condition with an excellent prognosis. Jeff Hersh, Ph.D., M.D., can be reached at DrHersh@juno.com .
It may also be useful in the treatment of severe mania that is non-responsive to medications. [81] [82] The most frequent side effects of ECT include memory impairment, headaches, and muscle aches. [14] In some instances, ECT can produce significant and long-lasting cognitive impairment, including anterograde amnesia, and retrograde amnesia. [83]
Retrograde amnesia is most marked for events occurring in the weeks or months before treatment. Anterograde memory loss usually resolves 2–4 weeks after treatment, whereas retrograde amnesia (which develops gradually after repeated treatments in the initial course) usually takes weeks to months to resolve, and amnesia rarely persist for more ...